Me too. Tank LB is niche but occasionally useful. DPS LB is of course almost always preferred. Healer LB 1&2 are basically only worth using if you are completely out of MP and the only person still standing is a tank. It doesn't really help newbie healers learn to care about the button, so they don't know about it when suddenly LB3 could save a wipe and be a crowning moment of awesome.
It's pretty useful in trial roulette and alliance raids, both of which have a habit of turning into fiascos sometimes.